/*
 * Copyright (C) 2023 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.settingslib.spaprivileged.framework.common

import android.content.BroadcastReceiver
import android.content.Context
import android.content.Intent
import android.content.IntentFilter
import android.os.UserHandle
import android.util.Log
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.channels.awaitClose
import kotlinx.coroutines.flow.Flow
import kotlinx.coroutines.flow.callbackFlow
import kotlinx.coroutines.flow.catch
import kotlinx.coroutines.flow.conflate
import kotlinx.coroutines.flow.flowOn

private const val TAG = "BroadcastReceiverAsUser"

/**
 * A [BroadcastReceiver] flow for the given [intentFilter].
 */
fun Context.broadcastReceiverAsUserFlow(
    intentFilter: IntentFilter,
    userHandle: UserHandle,
): Flow<Intent> = callbackFlow {
    val broadcastReceiver = object : BroadcastReceiver() {
        override fun onReceive(context: Context, intent: Intent) {
            trySend(intent)
        }
    }
    registerReceiverAsUser(
        broadcastReceiver,
        userHandle,
        intentFilter,
        null,
        null,
        Context.RECEIVER_NOT_EXPORTED,
    )

    awaitClose { unregisterReceiver(broadcastReceiver) }
}.catch { e ->
    Log.e(TAG, "Error while broadcastReceiverAsUserFlow", e)
}.conflate().flowOn(Dispatchers.Default)
